To convert molar mass (in grams per mole) to atomic mass units (amu), you can use Avogadro's number as the conversion factor. Avogadro's number is approximately 6.022 x 10^23 particles per mole. The molar mass is the mass of one mole of a substance, expressed in grams.
The conversion formula is as follows:
Molar mass (in amu) = Molar mass (in grams per mole) / Avogadro's number
Here's an example to illustrate the conversion:
Let's convert the molar mass of water (H2O), which is approximately 18.015 grams per mole, to atomic mass units (amu).
Molar mass (H2O) = 18.015 g/mol
Molar mass (H2O) in amu = 18.015 g/mol / (6.022 x 10^23 particles/mol)
Calculating the result:
Molar mass (H2O) in amu ≈ 2.991 x 10^-23 amu
So, the molar mass of water is approximately 2.991 x 10^-23 amu.